Elastic tire.



No. 682,442. Patented Se'pt. I0,"I90I. W. F. WILLIAMS.

ELASTIC TIRE.

(Application led may 13, 1901.) (No Model.)

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IVIIILIAM FREDERICK VILLIAMS, OF LONDON, ENGLAND.

ELASTIC TIRE.

SPECIFICATION forming part of Letters Patent No. 682,442, dated September 10, 1901.

Application filed May 13,1901. Serial No. 59,988. (No model.)

To @ZZ whom, it may concern:

Be it known that I, WILLIAM FREDERICK IVILLIAMS, a subject of the King of Great Britain, residing at 17 and 18 Great Pulteney street, Golden Square, London, England,have invented new and useful Improvements in Elastic Tires, of which the following is aspeciiication.

This invention has for its object to enable the elasticity of a hollow tire and its capacity to resist crushing under the load to be readily increased at will; and the improvement consists in the co mbination,wth a hollow tire, of an internal solid elastic core or cushion of such different cross-sectional shape to that of the hollow or space Within which it is contained that while affording a direct internal support to the tread portion of the tire vacant spaces will be left at the sides of the core or cushion, so that the core or cushion will have perfect freedom for expansion laterally when under compression by the load without liability of extension in the longitudinal direction. This internal supportingcushion may be applied within hollow tires of various sectional forms and be itself of various forms, the essential feature in all cases being that it is of such form as not to fill the space within which it is contained.

The invention is illustrated in the accompanying drawings, which represent a few eX- amples of various sectional forms ot' internal elastic cushion applied within hollow tires of various internal forms.

Figure l shows a crosssection of a tire having a bore of circular section containing a holding-on band and a core of circular section. Fig. 2 shows a cross-section of a tire having a bore of triangular section containing a holding-on band and a core of circular section, and Fig. 3 shows a cross-section of a tire hav'- ing a bore of triangular section containing a holdingon band and a core of approximately triangular section. i

ct is the tire, of circular or other external form in cross-section and ot' any desired internal cross-sectional form.

Z2 is the internal supporting cushion or core, of rubber.

In Fig. l the tire is of circular form externally and internally and is supposed to be clasped to the wheel-rim by a holding-on band c, provided upon its edges with tubular sheaths d to prevent cutting ofthe tire against the edges of the band. The elastic core or cushion h is contained within the tire in the space between the tread of the tire and the band c. It is of circular section and of such diameter as to lill such space in the direction of the pressure of the load, so that such pressure will be transmitted to the band c as an abutment for the cushion or core b; but the core Z) being of circular section, while the space Within which it is contained being in the form of a segment of a circle,vacant spaces will be left7 as atf, which permit of the free lat eral expansion of the core or cushion b under compression. To prevent longitudinal extension of the core or cushion, the latter may in all cases have cords g embedded in it, these cords having knots at intervals, so as to form a multiplicity of points of resist ance to prevent the cords tearing out of the rubber.

In Fig. 2 a hollow'tire is shown of triangular form in internal cross-section having a cushion or core b of circular section, and in Fig. 3 a tire of similar form is shown having a cushion or corel) of triangular or prismatic form in cross-section,the essential feature of the inventionnamely, the combination of such relative forms that lateral vacant spaces fare lei't for the lateral expansion ofthe corebeing the common feature otall these arrangements, which, as above mentioned, represent onlyafew of the possible forms in which the improvement may be embodied.

The core or cushion l) would in all cases be mad-e of rubber vulcanized to the degree of elasticity suitable to the tire to which it is to be applied and to the load which the tire is to be called upon to sustain, and being made separate from the tire and merely threaded through the same along with or separately from the holding-on band the core or cushion b maybe readilyexchanged for another which is more or less elastic, as the case maybe, whenever it is required to adapt the tire to suit altered conditions of load.

I claim- The combination with a hollow elastic tire, of an internal solid elastic core or cushion of highly-elastic rubber having embedded therein non-extensible cords knotted at in- IOO tervals and of such different cross-sectional shape to that of the bore or portion of the bore within which it is Contained, that Va.- cant lateral spaces will be left between the core or cushion and the sides of the tire, so that While aording internal support to the tread portion of the tire, the core or cushion will have perfect freedom for lateral expansion under compression by the load, as described.

WILLIAM FREDERICK WILLIAMS. Witnesses:

THOMAS W. KENNARD, C. G. CLARK. 

